Systems, methods, and devices for applying distributed forces for mandibular advancement

An intraoral orthodontic appliance for treating sleep apnea in a patient by displacing a lower jaw of the patient anteriorly relative to an upper jaw of the patient, the appliance comprising:

• an appliance shell comprising a plurality of cavities shaped to receive teeth of a jaw of the patient, wherein the appliance shell comprises an advancement structure arranged to interact with an opposing jaw of the patient so as to displace the lower jaw anteriorly relative to the upper jaw, and wherein the plurality of cavities comprises cavity geometries shaped to reduce repositioning of one or more received teeth elicited by displacement of the lower jaw anteriorly relative to the upper jaw, the cavity geometries further being shaped to reposition the patient's teeth towards a target arrangement and to apply a non-uniform force distribution comprising an amount of force applied to one or more posterior teeth that is greater than an amount of force applied to one or more anterior teeth.